Slow Motion Walk

Players can only cast one spell per turn.
Whenever a spell is cast, put a slow-mo counter
on Slow Motion Walk.
If Slow Motion Walk has 5 or more slow-mo
counters on it, creatures you control have haste.
{t} Remove a slow-mo counter from Slow Motion
Walk, target creature enters the battlefield
tapped and does not untap until its controller's
next untap step.